Cap-feeding mechanism fob biveting-machines



A. R. HAVENER.

CA? FEEDiNG MECHANiSiVI FOR RIVETING MACHINES.

APPLICATEON FILED JAN. 24. 1916;

Patente Aug. 8, 1916.

3 SHEETS-SHEET I.

ARM/NEWER" CAP FEEDING MECHANISM FOR RIVETING MACHINES.

APPLICATION HLED JAN. 24. NIB.

1 (,1 QQQQGQ atented Aug 8, 1916.

3 SHEETS-J'HEET 2.

I 1' v I 1 1 1 A R, HAVENER.

CAP FEEDING MECHANISM FOR RIVETING MACHIES.

APPLICATION FILED JAN- 24, I916.

Patented Aug. 8, 1916 3 SHEETS-SHEET 3.

ARTHUR It. HAVENER, OF WALTHAM, vMASSACHUSETTS,- ASSIGNOE TO J UDSON L.THOMSON .MFG. (30., A CORPORATION OF MASSACHUSETTS.

CAP-FEEDING- MECHANISM FOR BIVETING-MACHINES.

' Specification of Letters Patent.

Application filed January 24, 1916. Serial No. 73,787.

To all tvhom it mag concern:

Be it known that I, ARTHUR R. HAVENER,

\Valtham, in the county of Middlesex and State of Massachusetts, haveinvented new and useful Improvements in Cap-Feeding Mechanism forRiveting-Machines, of which the following is a specification.

This invention relates to machines for setting rivets in sheet materialand in the particular embodiment of my invention disclosed in thedrawings the machine illustrated is one which attaches articles to sheetmaterial by means of rivets which are riveted in rivet caps, and theinvention relates particularly to that portion of the machine whichfeeds the cap and places it in position for the rivet to be clenchedtherein.

In machines of this character the. rivet cap is disk-shaped and is fedto the rivet setting instrumentalities from a hopper down a verticalportion of the raceway around a curved corner portion of said racewayand along a horizontal portion of said raceway into alinement with theanvil and rivet setting instrumentalities. In the feeding of the rivetcap down the raceway, when it arrives at the curved portion, if gravityalone is depended upon to feed it around said curved portion from thevertical por-' tion of the raceway onto the horizontal portion thereof,it is liable to become stuck,

especially if there is any obstruction such as dirt or grease in theraceway, or if there is any inequality or imperfection n the rivet cap,and this invention is particularly devoted to the positive feeding ofsaid cap around said curved corner portion and onto the horizontalportion of said raceway.

To theseends the invention consists in the combination and arrangementof parts set forth in the following specification and particularlypointed out in the claims thereof. I have illustrated one embodiment ofmy invention in connection with a machine for attaching articles'tosheet material by means of rivets which are clenched in rivet caps, saidmachine being, substantially the same as a machine forming thesubject-matter of an application for U. S. Letters Patent filed by me onSeptember 27, 1915,'Ser1al l To. 52,816, and entitled Machine forattaching articlesto sheet material.

The invention consists in the combination and arrangement of parts setforth n the following specification and particularly I pointed out inthe claims thereof. a citizen of the United States, residing atReferring to the drawings: Figure 1 is a left hand side elevation of amachine embodying my invention. Fig. 2 is a central longitudinalsectional elevation of the same. Fig. 3 is an enlarged side elevation,partly in section, viewed from the left of the machine and illustratingthe mechanism for feeding the rivet caps. Fig. 4 is a front elevation:of the parts illustrated in Fig. 3. Fig. 5 isa sectional elevation takenon line 55 of Fig. 4. Fig. 6 is a front elevation similar to Fig. 4 butomitting the detent and showing the detent lingers in' section. Fig. 7is a diagrammatic view illustrating the position of the detent fingerswith relation to the rivet caps. Fig. 8 is a plan and sectional viewofone of the rivet caps.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, 10 is the frame of the machine, 11 is a rivet holder towhich the rivets are fed one by one from a hopper 12 down a raceway 13.The rivets are driven through the material and clenched in the rivet capby a driver 14 which slides in a suitable bearing in the frame and towhich a reciprocatory motion is imparted by a bell-crank lever 15,eccentric rod16 and eccentric 17 which is fastened to a rotary shaft'18. A

presser foot 19 holds theimaterial in position upon a work-support 20.An anvil 21 is provided in the upper end of a plunger 22 to which avertical reciprocatory motion is imparted by a lever 23 connected by alink 24 Patented Aug. 8, 1916..

tical portion of the raceway rests against the upper edge of areciprocatory slide 32 which is fastened to a tube 33 to which areciprocatory motion is imparted by a lever 34 pivoted at 35 to theframe of the machine and rocked by a cam 36 fast to the shaft 18.Another rivet cap 28 rests against the lower rivet cap 28.

The vertical portion 30 of the raceway is joined to a horizontal portion37 of said raceway by a curved corner portion 38. Said vertical portion30 has a groove 39 a ng wh ch the rivet aps slide' and this is coveredin the upper part of said raceway by cap plates 40 and in the lower partof the vertical portion of said raceway said groove is covered by asingle cap plate 41'. The curved portion 38 of said raceway is left openat its upper side in order that rivet caps may be removed therefrom ifdesired, except that said open portion is closed at certain times by adevice hereinafter described. The horizontal portion 37 of the racewayis also provided with cap plates 42 which cover the groove 43 into whichthe rivet caps are slid by the feed slide 32.

A detent 44 is provided adjacent to the curved portion 38 of the racewayand this detent comprises an arm 45 pivoted at 46 to the frame of themachine. The arm 45 has two fingers 47 fast thereto, these fingers beingpointed at 48 and curved ,on their rear edges at 49. In addition to thefingers 47 the arm 45 has a downwardly projecting plate 50 fastenedthereto which has a camshaped lower edge 51. A spring 52 attached to thearm 45 tends to rock the arm '45 downwardly about its pivot 46. I

A stop pin 53 engages one of the cap plates 42 of the horizontal portionof the raceway to limit the downward movement of the arm 45 and of thedifierent parts of the detent attached thereto.

The general operation of the mechanism hereinbefore specificallydescribed is as follows: The rivet caps descend the vertical portion 30of the raceway 31, as stated, until the lowermost rivet cap 28 restsagainst the upper edge of the slide plate 32, while the next rivet cap28' above said rivet cap 28 rests thereagainst in the positionillustrated in Fig. 7 and in dotted lines in Fig. 3, When the slide 32is moved backwardly or toward the left from the position shown in Figs.2 and 3 to the position shown in Fig. 5, the detent arm 45 will be swungdownwardly by the spring 52 as soon as the lower edge of the plate 50 isreleased by the slide plate 32 until the stop pin 53 engages one of thecap plates 42 of the horizontal portion 37. During this movement of thedetent, as a whole, the pointed ends 48 of the detent fingers 47 areinserted between the two rivet caps 28 and 28', as illustrated in Fig.v7 in the space between the curved upper edge of the rivet cap 28 andthe" curved lower edge of the rivet cap 28. At the same time that thismovement of the de tent fingers occurs, they will move not only therivet cap 28 downwardly with sufficient 60 force to cause it to passdownwardly and around the curved portion 38 of said raceway and onto thehorizontal portion 37 thereof, as illustrated in Fig. 5, while at thesame time the curved rear edges 49 of these fingers will engage the.lower edge of the.

comprisin rivet cap28 and, prevent its moving down the raceway untilafter another complete cycle of operations of the machine takes place.

The movement of the detent fingers toward the vertical portion of theraceway and simultaneously downward is obtained by the location of thepivot 46 which is at the rear of the vertical portion of the raceway andabove the pointed ends 48 of the fingers 47. The detent now being in theposition illustrated in Fig. 5, upon the next.

anvil 21 and with the driver 14. The lever, 23 is then actuated bv thelever 25 and cam 27 to carry the rivet cap up against the under side ofthe goods as it rests upon the work-support 20, while ,the rivet holder11 is brought downwardly adjacent to the upper side of the material intowhich it is to be driven, and the rivet is then driven out of the rivetholder 11 and through the material to clench the same in the rivet cap28 by the driver 14 which is operated by the bell-crank lever 15,eccentric rod 16 and eccentric 17. During this operation the rivetholder is operated to move downwardly by means of a slide 54. lever 55and cam 56 and is moved upwardly on the return motion through a spring57 which connects the lever 55 to the slide 54.

It will be noted that when the plate 50 assumes the position illustratedin Fig. 5, the lower edge of said plate forms a cover for the curvedportion 38 of the raceway to prevent any rivet caps from passing out ofsaid curved portion as they pass around the samefrom the verticalportion of the raceway to the horizontal portion thereof."- Upon thenext forward movement of the slide 32 the operation hereinbeforedescribed is repeated and another rivet cap is carried forward intoalinement with the anvil and driver to have another 'rivetclenchedtherein.

Having thus described my invention,

what I claim and desire by Letters Patent to secure is:

1. A machine for feeding rivet caps and the like having, in combination,a raceway a vertically disposed portion and a horizontally disposedportion joined together by a curved corner portion, means fortemporarily supporting two of said rivet caps on said verticallydisposed portion of said raceway and constructed and arranged to bewithdrawn, a detent adjacent to said curved corner portion and meansconstructed and arranged to move said detent laterally with relation tothe faces and between two of said rivet caps on the vertical portion ofsaid raceway, in such manner that the lower one of said rivet caps willbe pushed downwardly with sufficient force to cause. it to pass aroundsaid corner portion of said raceway after said supporting means has beenwithdrawn and the upper one of said rivet caps will be prevented by saiddetent from passing down said raceway.

2. A machine for feeding rivet caps and the like having, in combination,a raceway comprismg a vertically disposed portion and a horlzontallydisposed portion joined together by a curved corner portion, means fortemporarily supporting two of said rivet caps on said verticallydisposed portion of said raceway and constructed and arranged to bewithdrawn, a detent adjacent to said curved corner portion and meansconstructed and arranged to move said detent laterally with relation tothe faces and between two of said rivet caps on the vertical portions ofsaid raceway and to move said detent downwardly in such manner that thelower one of said rivet caps will be pushed downwardly with sulficientforce to cause it to pass around said corner portion of-said racewayafter said supporting means has been withdrawn and the upper one of saidrivet caps .will be prevented by said detent from passing down saidraceway.

3. A machine for feeding rivet caps and the like having, in combination,a raceway comprising a vertically disposed portion and a horizontallydisposed portion joined together by a curved corner portion, means fortemporarily supporting two of said rivet caps on said verticallydisposed portion of said raceway and constructed and arranged to bewithdrawn, a detent adjacent 'to saidv curved corner portion with twofingers thereon and means constructed'and arranged to move said fingerslaterally with relation to the faces and between the adjacent edges oftwo of said rivet caps on the vertical portion of said raceway and tomove said fingers downwardly, in such manner that the lower one of saidrivet caps will be pushed downwardly with suflicient force to cause itto pass around said corner portion of said raceway after said supportlngmeans has been withdrawn and the upper one of said rivet caps will beprevented by said fingers from passing down said raceway.

4. A machine for feeding rivet caps and the like having, in combination,a raceway comprising a vertically disposed portion and a horizontallydisposed portion joined together by a curved corner portion, means fortemporarily supporting two of said rivet caps on said verticallydisposed portion of said raceway and constructed and arranged to bewithdrawn, a detent adjacent to said curved corner portion, a pivot forsaid detent substantially parallel to the faces of said rivet caps onsaid vertically disposed portion of said raceway, two fingers'on saiddetent and means to rock said detent on said pivot, said pivot being solocated relatively to said raceway that when said fingers are movedtoward said raceway and between two of said rivet caps on said verticalportion of said raceway, said fingers will move downwardly, in suchmanner that the lower one of said rivet caps will be pushed downwardlywith suflicient force to 0 .use it to pass around said corner portion ofsaid raceway after said supporting means has been withdrawn and the"upper one of said rivet caps will be prevented by said fingers frompassing down said raceway.

5. A machine for feeding rivet caps and the like having, in combination,a raceway comprising a vertically disposed portion and a horizontallydisposed portion joined together by a curved corner portion, means fortemporarily supporting two of said rivet caps on said verticallydisposed portion of said raceway and constructed and arranged to bewithdrawn, a detent adjacent to said curved corner portion, a pivot forsaid detent substantially parallel to the faces of said rivet caps onsaid vertically disposed portion of said raceway, means constructed andarranged to move said detent laterally with relation to the faces andbetween two of said rivet caps on the vertical portion of said racewayand to move said detent downwardly, in such manner that the lower one ofsaid rivet ca s will be pushed downwardly with su cient force to causeit to pass around said corner portion of said raceway after saidsupporting means has been withdrawn and the upper one 'of said rivetcaps will be prevented by said detent from passing down said raceway anda plate on said detent constituting a cover for said corner portion ofsaid raceway when said-detent is in operative position, said plate beingmoved away from said corner portion and leaving the same uncovered whensaid detent caps on said vertically disposed portion of said raceway, aplate on said detent constituting a cover for said corner portion ofsaid raceway when said detent is in operative position, said plate beingmoved away from said corner'portion and leaving the same uncovered whensaid detent is out of operative position, two fingers on said detentlocated on opposite sides of said plate and means to move said detentlaterally with relation to the faces of said rivet caps until saidfingers project between the adjacent edges of said rivet caps on thevertical portion of said raceway, in such manner that the lower one ofsaid rivet caps will be pushed downwardly with suflicient force to causeit to pass around said corner portion of said raceway after saidsupporting means has been withdrawn and the upper one of said rivet capswill be prevented by said fingers from passing down said raceway.

' 7. A machine for driving a rivet in a piece of sheet material andclenching the same in a rivet cap having, in combination, a racewaycomprising a vertically disposed portion, a horizontally disposedportion and a curved corner portion j oining said vertically disposedand horizontally disposed portions of said raceway together, a detentadjacent to said curved corner portion, a plate on said detentconstituting-Ya cover-for the corner portion of said raceway when saiddetent is in its operative position, said late having a cam-shaped loweredge, two ngers on said detent located on opposite sides of said plate,means to move said detent until said fingers project between theadjacent edges of said rivet caps, in such manner that the lower of saidrivet caps will be pushed downwardly with suflicient force to cause itto pass around said curved portion of said raceway and the upper of saidcaps will be prevented from passing down said raceway and a slideconstructed and arranged to be moved along the horizontal portion ofsaid raceway to engage the rivet cap on said horizontal portion, saidslide in its forward movement being also constructed and arranged toengage said cam-shaped edge of said detent plate and move said fingersout of engagement with the rivet cap located immediately above them onthe vertical portion of said raceway to allow said last-named rivet capto descend said vertical portion of said raceway and rest upon saidslide.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses;

ARTHUR R. HAVENER.

Witnesses:

CHARLES S. Goonrive, SYDNEY E. TAFT.

